Five years ago, an open-source browser called Firefox—one that didn't ship with your computer—was available as a 1.0 download. To say it's changed the world's web experience is understatement. Here's a look back at five years of the 'fox.

Read on for an overview of the life of Firefox, including its journey from from its Netscape ancestry to the modern browser we've come to know and love-and a quick peek at what's around the corner.

The Prelude: Netscape

April 22, 1993: Following five months of development, version 1.0 of Mosaic, one of the very first web browsers that can display graphics next to text, is released. It was developed at the National Center for Supercomputing Applications (NCSA), by a team led by future brand-name entrepreneurs Marc Andreessen and Jim Clark. Windows and Macintosh ports are released in Dec. 1993.

April 4, 1994: Clark and Andreessen leave NCSA and found Mosaic Communications Corp., which then changes its name and flagship product to Netscape. The company gets a Godzilla-style dragon as a mascot, and the development code names their browser "Mozilla," after the creature.

Aug. 1996-March 1998: Navigator becomes just a part of the Netscape "Communicator" package with the 3.0 "Gold" release and 4.0, and also fairly crash-prone, bug-addled, and slow. Microsoft, meanwhile, has won over PC vendors with its custom-branded, deeply-embedded Internet Explorer installations, which, by the 5.0 release, is generally faster than Communicator's 4 versions.

Mozilla is born

Jan-March 1998: Netscape announces it will release its application suite's source code, and forms the Mozilla Organization. It was initially intended as a testing grounds for new features—much like Google's open-source Chromium and end-user Chrome projects of today.

March 1998-Aug. 2001: Netscape misses a 5.0 release entirely and dedicates its engineers to a rebuild using Mozilla's code base for 6.0. Internet Explorer continues to gain market share, and Netscape 6, rushed out in pre-beta shape by corporate parent AOL, doesn't run reliably on anything but the most powerful PCs, due to its heft. IE's market share is approaching 90 percent, and the writing, as they say, is on the wall for Netscape.

June 5, 2002: The Mozilla project releases a 1.0 version of its browser, well past original deadlines. While criticized for being overly stuffed and slow, the suite is the birthplace of things that later become Mozilla staples: the first implementation of the Gecko layout engine; versions for Windows, Mac OS, Linux, and Solaris; and an extensible user interface, XUL, that can be customized with add-ons and built out for other web-facing applications.

Sept. 23, 2002: Dave Hyatt and Blake Ross break off from the main Mozilla suite to develop a stand-alone browser, first appearing as Phoenix. Between versions 0.1 and 0.9, it changes names three more times (to Firebird, then Mozilla Firebird, then, finally Firefox), and gets a whole new look. That's due in large part to a branding criticism by Steven Garrity, who then heads up Mozilla's identity team.

July 15, 2003: AOL no longer wants to manage the Mozilla Organization, so it sets up the Mozilla Foundation, a not-for-profit that gets Mozilla's intellectual property and transition support.

Just prior to Firefox 1.0 arriving, Mozilla's Scott Collins, a veteran of Netscape and evangelist for the Mozilla team, said this to Linux.Ars:

"I have hope that we will be a mainstream browser and that people will use Mozilla. That's the thing I learned to lust after as a programmer. It's not my ability to solve one problem, to plow this field, but the ability to build a plow that every farmer uses. The ability to make something that touches not ten people, not a hundred people, not a thousand people but a hundred million people. I want Mozilla to be there again. IE is a browser with no soul. I want it to be Mozilla because I think that people who care deserve a browser with a soul."

Firefox rising: 1.0 & 1.5

Nov. 9, 2004: Firefox 1.0 is released. In about four months, WindowsITPro reports a six percent browser share. What's really new and worth noting? First off, tabbed browsing, which, at the time, was fairly unique for a mainstream browser. A password manager, extensions and a site listing approved add-ons and themes, automatic and smooth scrolling, and native support for RSS/Atom feeds. Oh, and the size: 4.5 MB.

If you aren't already using Mozilla's Firefox browser, drop everything immediately and make the switch. We could start listing all the reasons why it's a superior web browser - pop-up blocking, tabs, enhanced security, the plethora of custom extensions - but then we'd melt into a heap of gushy software rapture. And that would be a little creepy. Even for us.

Then again:

Here's some tweaking you can do to make your browsing even faster ... 1.Type "about:config" into the address bar ...

There you have it. Even when we thought Firefox was a heaven-sent gift from the software heavens, we wanted you to rip it open and make it faster. This dual-threaded thought is still running, of course, this very minute.

Nov. 14, 2005: Firefox 1.5 is released, originally intended as Firefox 1.1. It's a roadmap for how future .5 releases would arrive—with some new features, perhaps, but not as a major retooling. We make our first joke about what "Clear Private Data" might be best used for, while noting the tighter Mac look, better pop-up blocker, automatic updating, and drag-and-drop tab ordering. We didn't exactly dig the unresponsive script dialog, though, and offered our first look at making extensions work with a new version. (Original Firefox 1.5 post)

March 2005: Somewhere around this time, developer Aaron Boodman releases the first version of the Greasemonkey add-on, allowing for custom bits of "DHTML" called user scripts that, according to CNET, allow for secure Gmail connections, remove ads, auto-insert printable New York Times links, and other neat tweaks. The makers of the Opera browser almost immediately integrate user scripts into their next builds.

Oct. 2005: Gina details one of the little nerdy perks that makes Firefox indispensable to many serious web geeks: quick keyword searches. Adam later expands on the power of Firefox's bookmarking to jump inside structured web directories and quickly launch bookmarklets with The Art of Keyword Bookmarking.

July 2006: We take a peek at the Firefox 2.0 beta 1, and come back screaming squeeeee (okay, maybe just one of us) at built-in spell checking, an RSS preview page, and the option to re-open recently closed tabs.

Firefox 2

Oct. 24, 2006: Firefox 2.0 officially drops, with better security, as-you-type search, and a more modern-looking browser "chrome" (or interface styling). One day later, we've already got the master list of about:config tweaks, many of which still work in modern Firefox browsers.

Oct.-Nov. 2006: Internet Explorer 7 was released less than a week before Firefox 2.0, and, in a shock heard 'round the geek world, it wasn't somehow worse than 6—in fact, it had a few notable bragging points. It handles feeds better, it's better with memory, and it's not drastically worse at fighting phishing scams. That said, it's still a web designer's worst nightmare and complied to no standards but Redmond's own.

Firefox 3, 3.5, and beyond

Nov. 2007: Firefox releases a beta of what, at the time, seemed like a soon-to-drop 3.0, and Adam grabs it and takes some screenshots. In some ways, it's surprisingly free of revolutionary new features, but it also refines a lot of what was already great about Firefox, including its bookmarking system and extensions.

What are your earliest memories of Firefox? How have you worked with, switched from, or switched back to it over the years? We'd love to hear your reminiscences of the browser born from Netscape in the comments.